摘要
以徐州白蒜和太仓白蒜２个地方品种试管苗进行试管鳞茎培养，结果表明，鳞茎形成需较高温度条件的诱导，１５℃下培养的试管苗转入２０～２５℃高温下可形成鳞茎；４℃低温预处理促进鳞茎形成。对长日照的要求因品种而异，早熟品种徐州白蒜在８～１６ｈ日长下均可形成鳞茎，晚熟品种太仓白蒜在８ｈ短日下不形成鳞茎。鳞茎形成过程中，内源激素ＡＢＡ含量升高，ｉＰＡ下降，ＩＡＡ先剧烈升高，然后下降，ＧＡ先下降，然后升高。鳞茎开始形成时，ｉＰＡ／ＡＢＡ和ＧＡ／ＡＢＡ下降，ＩＡＡ／ＡＢＡ升高。温度对ＩＡＡ／ＡＢＡ有明显影响，对长日照要求严格的品种其ｉＰＡ／ＡＢＡ变化受光周期的调节。
Plantlets of 2 local varieties growing at 15℃ bulbed when transferred to 20～25℃. Preincubation at 4℃ low temperature enhanced but not directly induced bulbing. Photoperiod affact bulbing varied with varieties. Taicang White,the late maturity variety,had more strict requirements. Its plantlets only bulbed under daytimes longer than 12 hr,and no bulb formed under short day. Photoperiod was not found to have such effects on the early maturity varieties Xuzhou White. Analysis of endohormone using ELISA showed that during bulbing,contents of ABA increased while iPA decreased,contents of IAA greatly increased but GA varied inversely to IAA.At the begining of bulb indution,ratioes of iPA/ABA and GA/ABA decreased and that of IAA/ABA increased. The variation of IAA/ABA was mainly influenced by temperature,and that of iPA/ABA for photoperiod sensitive variety by photoperiod. It was concluded that high temperature was one of the main inducing factors in garlic bulbing.
出处
《园艺学报》
CAS
CSCD
北大核心
1997年第2期165-169,共5页
Acta Horticulturae Sinica
